A nurse is collecting data from a client. The provider suspects the client may have the syndrome of inappropriate antidiuretic hormone (SIADH). When obtaining a medical history, the nurse should ask for additional information about which of the following conditions? (Select all that apply.)

Choice A reason: The correct answer is a because hyperkalemia, or high serum potassium levels, often leads to peaked T waves on an ECG. A reduction of T wave amplitude indicates that potassium levels are decreasing and the medication is effective.

Choice B reason: P wave duration is not typically affected by hyperkalemia. Changes in the P wave are more commonly associated with atrial abnormalities, not electrolyte imbalances.

Choice C reason: Widening of the QRS complex is a sign of severe hyperkalemia and indicates worsening of the condition. The goal of treatment is to prevent such changes, not to observe them as an indication of effectiveness.

Choice D reason: Restoration of QRS complex amplitude is not a specific indicator of hyperkalemia or its treatment. The focus should be on changes in the T wave and other signs of electrolyte normalization.

Choice A reason: Cushing's disease often causes hypokalemia, or low potassium levels, due to increased aldosterone production. Therefore, limiting potassium-rich foods is not advisable; rather, patients may need to increase their potassium intake to maintain electrolyte balance.

Choice B reason: The correct answer is b because Cushing's disease leads to sodium retention and fluid retention, causing hypertension and edema. Decreasing sodium intake helps manage these symptoms by reducing fluid retention and controlling blood pressure.

Choice C reason: Increasing calorie intake is not recommended for clients with Cushing's disease. The condition often leads to weight gain and increased adipose tissue, so a balanced diet with controlled calorie intake is more appropriate.

Choice D reason: Consuming more calories from carbohydrates than protein is not a specific recommendation for Cushing's disease. A balanced diet with adequate protein is important for maintaining muscle mass and supporting overall health, especially since Cushing's disease can cause muscle weakness and loss of muscle mass.